package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import java.time.LocalDateTime;


/**
 * @author jay
 */
@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 登录方法
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();//MP所提供的Wrapper类(空的)
        //eq 相当于 Employee::getUsername=employee.getUsername()
        wrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(wrapper);//从数据库中查询出emp对象来
        //3、如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败");
        }
        //4、密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败");
        }
        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }
        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());//用session数据共享
        return R.success(emp);
    }

    /**
     * 退出方法
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理session中保存的当前员工id
        HttpSession session = request.getSession();
        session.removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息为：{}", employee);
        //设置初始密码，并进行md5加密
        String md5PassWord = DigestUtils.md5DigestAsHex("123456".getBytes());
        employee.setPassword(md5PassWord);

        //给剩下的null属性赋值，static不用，默认值为1，id也不用，会自动用雪花算法新增
        //使用MP的公共字段自动填充的办法;避免重复代码,故这一段注释掉
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setCreateUser(empId);
        //employee.setUpdateUser(empId);

        //调用方法
        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //Page为MP定义的类，里边有定义前端需要的数据data.records, data.total
        log.info("page={}, pageSize={}, name={}", page, pageSize, name);
        //构造分页构造器page
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询：条件分页查询,第一个参数是page类，第二个参数实体对象封装操作类 QueryWrapper
        employeeService.page(pageInfo,queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 修改员工信息
     */
    @PutMapping
    public R<String> update(@RequestBody Employee employee, HttpServletRequest request){
        log.info("员工id和状态：id = {}, status = {}",employee.getId(),employee.getStatus());
        //更新信息
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setUpdateUser(empId);
        //employee.setUpdateTime(LocalDateTime.now());
        //调用service方法修改数据库数据
        employeeService.updateById(employee);
        return R.success("状态修改成功~");
    }

    /**
     * 按id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("id = {}", id);
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("未查到该用户");
    }
}
